#drop-area {
    border: 2px dashed #ccc;
    border-radius: 20px;
    width: 100%;
    padding: 20px;
    text-align: center;
    cursor: pointer;
}

    #drop-area.highlight {
        border-color: #007bff;
        background-color: #f8f9fa;
    }

#file-list {
    margin-top: 20px;
}